Side-slip weft detector



March 27, 1928. I 1,663,934

A. CEDERLUND snm SLIP WEFT DETECTOR Filed Feb.4, 1926 2 Sheets-Shoat 1 2a 30 as March 27, 1928. 1,663,934

A. CEDERLUND SIDE SLIP WEFT DETECTOR Filed Feb.4, 1926 1 2 Shoots-Sheet 2 WJW Patented Mar. 27, 1928.

"UNITED STATES i r 1,663,934 I PATENT ounce.

itL iEltT QEDE L N Q1 WQBQCE TEB, MASS USE'E'IS; A IQIQK CBQMET Q KNOWLE OOM O K 0E QBQEST B, MASSAQ USETB, A' QB OBATI O MASSACH SE T SIDE-SLIP WEFT DETECTOR.

Application filed February 4, 1526. Serial R0,. 83,071.

This invention relates to weft detecting mechanism for looms and it is the principav object of the invention to provide a detect tor which shall be reliable in operation w-ithoutbeing pressed too heavily against the filling to the end that chafing of the yarn may be avoided.

In the weaving of very fine yarn such as rayon it is found that a bobbinwill last for such a long time that ordinary weft detectors abrade the detector engaging portions of the yarn beforerthebohbin is exhausted Attempts have been made to avoid this defeet by rendering the detectors intermittent. ly operative but such involve a multiplicity ,of parts which not only add to. the expense of the motions, but

add to the labors of the loom fixers. Efforts have also been made to lighten the springs which return the detectors to normal position, but this has usually resulted in a lessened reliability of the motion It is an important object of my invention to construct a side slip feeler in such away that a portion of the force required to return the detector to normal position shall be applied in a direction substantially perpendicular to the movement imparted to the detecting surface by the yarn, such portion of the force having no' component which exerts pressure on the yarn.

'Vith these "and other objects in view which will appear as the description proceeds, my invention resides in the combina-. tion and arrangement of parts hereinafter described and set forth in the claims.

In the accompanying drawings wherein I have shown a convenient embodiment of my invention, 2

Fig. 1 is a top plan view of a detector mechanism havmg my invention applied thereto, certain parts being in section,

Fig. 2 is a vertical transverse section taken on line 2-2 of Fig. 1, a portion of the sup: port for the detector being in section,

Fig. 3 is a plan view of a portion of the mechanism shown in Fig. 1 with parts removed to show the interior of the supportmechanisms usually the; slide as the detec or engages a full. bob

ing the detecter in. indicating. position. when contacti g with a substantially exhausted bobbin, and

7 Figs. 5, 6, 7 e enlarged horizontal.

ransverse sections on lines a s, 6-76, and respectively, 0i Fig, 3i

Referring tethe drawings it will be seen ha Ilhaveprovide a weft detect r stand 10 supported in any approved manner by b Saidlere isccnnented to a link the lower portion of whic is. indicated in section at tin Fig; l to actuate weft replenishing mechan srn o the style shown in Patent No. 40 Q,74; 8i The other end of said actuatin Y lever .13 mo es ver ically in a slot form.

in arm l1: and is designed to. descend across ore 15; 11L the arm, ll on a detecting beat. of he oemwhen ufficient wefttfor continued wearing lspresena field actuating lever; is ii dication fweft exhaustion by a contro ler 16 movable longitudinally in the her .15. andsupported atthe forward end by alever .17 secured to a rock shaft. 18.

which ex ends through a pair [of forwardly 8 projecting horns. 18 forinedas part of the frame 10. The right hand end of the shaft 18 as shown in Fig.1 hasisecured thereto a second lever 20 controlled by mechanism to be described hereinafter and a spring 21 te posedbetween azcollar 22 secured to the shaft 18 and one of the horns 19 serves to hold the ountroller 16 in forward position out ofthe path of the actuator lever 13.

Mounted-on stand .lOis a teeler bed 23 suppertedon abolt' 25L carried by stand 10. A cap. is secured to. the bed by means of screws 26. and has, extending'therethrough a guide rod 27 passing through a clip '28 exs tending upwardly from a slide 29 received and guided by the M5123; A spring Bflsur:

5 Fig. e ls-a iew imilarto E gl 3 but show- 0 tripped at the time 75 F rier to theright as s rounds the reduced portion of stud 27 and extends between the front wall of the cap and the clip 28 to push the latter against the enlarged threaded end 31 of the stud. In this way the slide 29 is held yieldingly in rearward position. The matter thus far described is of common construction and forms no part of my invention with the exception of the controller pin 16 which is normally out of the path of the actuator and is moved under the lever 13 at weft exhaustion.

In carrying out my invention I provide a sliding and angularly movable carrier 40 10- cated between ahe upper and lower walls of the slide 29 as shown in Figs. 5 and 6 and light compression spring 46 surrounds the rod 41 and extends between the head 42 and the lug 44 to hold the carrier normally in rearward position.

Said carrier is provided with a pair of real-wardly extending ears 47 between which extends a stud 48 forming a free pivotal support for a weft detector 49. Said detector has a rearwardly extended yarn engaging tip 50 offset from the axis of the movable carrier 40. Said detector 49 has a forwardly extending shorter arm 51 which lies between the opposite sides of the carrier 40 and has a rounded end 52 for engagement with the right hand wall 53 of the slide 29. A leaf spring 54 has the forward end thereof caught under the screw 43 and has the rear end rounded for engagement with the leftha-nd wall 55 of the slide 29. Said spring 54 serves normally to hold the carown in Fig.- 3 so that detector 49 is properly positioned for engagement with the advancing bobbin.

Pivotally mounted as at 56 on the slide 29 is a bell crank lever 58 pivotally connected to a rod 59 the forward end of which is attached to the upper end of lever 20. Said lever 58 has an arm 60 which presses against the left hand wall of the carrier 40, being held against said wall as shown in Fig. 3 by the action oftorsion spring 21.

In operation under normal conditions the slide 29 is held yieldingly in rearward position by spring 30 with the carrier 40 in the position shown in Fig. 3, said slide being held in this position by the combined action of leaf spring 54 and torsion spring 21. So long as sufficient weft is" present the detector tip 50 will be restrained against longitudinal movement along the bobbin and will move forwardly as the lay advances, moving the carrier 40 forwardly from the full line to the dotted line position shown in Fig.

'3. Under these conditions lever 58 will remain unchanged angularly with respect to slide 29 and the latter will remain in the position shown in Fig. 3, the controller pin 16 therefore remaining at rest to permit the actuator lever 13 to descend without interruption. l/Vhen insufiicient weft forcontinued weaving remains on the bobbin, how

ever, the detector 49 will be moved angularly about its pivot 48 and slide longitudinally alongthe bare bobbin as shown in Fig. 4. The result of this action is to move the carrier .40 to the left, detector 49 moving about the rounded portion 52 as a pivot, thus causing an angular displacement ofsaid carrier. As said carrier moves to the left the detector 49 is free to return to normal'po-- sition, springs, 54 and 21 will by their combined action move the carrier 40 into engage ment with the wall 53 of the slide 29, the forces'of said springs being applied sub. stantially at right angles to the motion of the member 40 so that no component of said forces is brought to bearron the surface to bedetected. The light compression spring Said controller 16 will therefore 46 returnsthe detector to its normal rear-' ward position.

At the time of transfer some portion of the transferrer mechanism, not shown, will engage the lug 7 O which is rigid with respect to the slide 29 and will act throughadjustable collar 45 against the compression spring 30 to move the detector 49 out ofthe path of the incoming bobbin. The arm 51 is shorter than the rearwardly extending portion of the detector 49 and springs 54 and 21 apply their pressure to the carrier between the detector and the block 44' which serves as a pivot for the carrier when the latter swings to in dicating position. 7

From the foregoing it will bev seen tha I have provided a weft detector having a yarn engaging portion formed as a lever with unequal arms the longer of which 1 is positioned for engagement with the yarnand the shorter of which isemployed to move the carrier of the detector angularly to impart indicating motion to the controller pin 16. It will further be seen that a part of the force required to restore and hold the'de tector in normal position is supplied by resilient devices whichoperate in a direction transverse of the mounting for the detector in such a way that no component thereof will exert pressure on the surface to be detected.

Having thus described my invention it will be apparent that changes and modifications may be made therein by those skilled in the art'without departing from the spirit and scope of the invention, and I do not wish to be limited to thedetails herein disclosed but what I claim is:

1. In a weft detecting mechanism for i looms, a support, a carrier slidably and angularly movable on the support, a weft detector supported by and mounted for angular movement on the carrier and having a side slipping movement along an exhausted bobbin, said detector having a portion to engage the support to move the carrier an gularly with respect to the support at substantial exhaustion of weft, and means effective when the carrier moves angularly to indicate weft exhaustion.

2. In a weft detector for looms, a support, a carrier slidable on the support and angularly movable with respect thereto, a side slipping weft detector supported by and pivoted on the carrier and having a yarn engaging portion and a support engaging.

portion, said yarn engaging portion being movable along a substantially depleted bobbin while the other portion of the detector is in contact with the support to move the carrier angularly with respect to the support, and means effective when the carrier moves angularly to indicate exhaustion of weft.

8. In a weft detector for looms, a support, a carrier slidably and angularly movable with respect to the support, a detector pivoted to the carrier and having portions extending on both sides of the pivot thereof, one portion to engage the surface to be detected and the other portion on the opposite side of the pivot being in contact with the support, said portion to engage the surface to be detected moving along an advancing bobbin to move the detector angularly with respect to the carrier while the other portion is in contact with the support to move said carrier angularly, and exhaustion indicating means operatively connected to the carrier to indicate exhaustion when the latter moves angularly.

i. In a weft detector for looms, a support, a carrier slidably and angularly movable on the support, a detector pivotally mounted on the carrier having a relatively long rearwardly extending yarn engaging arm with a yarn engaging surface disposed to one side of the axis of the carrier, said detector having a relatively shorter forwardly extending arm in contact with the support, resilient means to hold said forwardly extending arm in contact with the support and said arrier in normal position, said detector moving along a substantially depleted bobbin angularly with respect to the carrier to move the latter angularly with respect to the support tion along a depleted bobbin, said detector having a portion extending in contact with the support whereby the carrier is moved angularly with respect to the support at such times only as the detector slides along a denuded bobbin, and resilient means acting transversely of the carrier to return the latter to normal position after an indicating movement of the detector.

6. In a weft detector for looms, a support, a carrier slidably and angularly movable on the support, a detector pivotally mounted on the carrier andhaving arms extending on both sides of the detector, one of said arms having a yarn engaging surface offset from the axis of the carrier and the other of said arms extending in operative contact with the support, yielding means to hold the carrler 1n normal rearward position, and additlonal yielding means acting transversely of the carrier to restore the same to normal.

position after an indicating movement of the detector. I

7. In a weft detector for looms, a support, a carrier slidabl and angularly movable on the support, a side slip weft detector pivotally mounted on the carrier and having a rearwardly exending offset yarn engaging portion and a forwardly extending support engaging portion, yielding means-acting 1n the direction of the axis of the carrier to hold the same normally in rearward position, and additional ielding means carried by the carrier and having sliding contact with the support to exert lateral pressure on the carrier to restore the same to normal angular position with respect to the support.

8. In a weft detector for looms, a support, a carrier slidably and angularly movable on the support capable of sliding movement independently of angular movement, a weft detector pivotally mounted on the carrier and having a portion to engage the surface to be detected and another portion to engage the support, said detector having a side slipping movement at the time of substantial exhaustion of weft to move the carrier angularly with respect to the support because of the engagement of the latter by the second named portion of the detector, and means for mounting the support for yielding movement in the direction of the advancing supply to be detected.

9. In a weft detector for looms, a support,

a carrier angularly and slidably mounted on the support capable of sliding movement independently of angular movement and normally disposed substantially perpendicular -to the surface to be detected, a detector supexhaustiommeans movable with the detector 1 i to engage the support and thereby move the carrier angularly as the detector has an in.- dieating movement to move the carrier from a perpendicular to an oblique position with respect to the surface to be detected.

In testimony whereof I have hereunto afiixed my signature.

ALBERT CEDERLUND. 

